Solution of exercise no (v) page 39 of Higher Algebra by Barnard and Child
If (1+x+x^2)^n=c_0+c_1x+c_2x^2+...+c_2n x^(2n) than prove that
c_n =1+n(n-1)/1^2+n(n-1)(n-2)(n-3)/(1^2*2^2)+...
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Solution of exercise no (v) page 39 of Higher Algebra by Barnard and Child
If (1+x+x^2)^n=c_0+c_1x+c_2x^2+...+c_2n x^(2n) than prove that
c_n =1+n(n-1)/1^2+n(n-1)(n-2)(n-3)/(1^2*2^2)+...
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